Well the Cobalt SS must be REALLY overdone from the factory, then, because it uses an M62 on a 2.0 litre...
For performance use, the M90 is too small for the Aurora. It's big enough for factory horsepower on an L67, which the Aurora makes WITHOUT a supercharger. The 4.0 is only slightly bigger than teh 3.8, but it's got 32 valves moving air through it, while the 3800 only has 12. The Aurora breathes a LOT better and thus needs a supercharger that can move more air. I'd go with an M112.
Eaton SC mounting question
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Re: Eaton SC mounting question
I've never seen an aluminum one. :thumbleft:scrabblegod wrote:Here is the coupler I use. A friend cranks them out on a CNC. The bearings I buy at the local bearing supplier.EBSB52 wrote: And the couplers chatter, so to replace it b4 you install it would be good. A total rebuild with bearings would cost <150.
Gene